I believe you are reading more into the statement than was intended.
No one here has made a personal attack. Well, except you...but I believed that was a response to high emotions, and I chose to ignore it.
For reference...
1. "No one here has made a personal attack. "
You made a personal attack ("that is not reason to get snippy"). Instead of acknowledging it, you belittling me- that is uncivil
2. About "cheap talk"
From wiki: In the context of game theory, "cheap talk" refers to communication between players that is costless to transmit and receive, non-binding, and unverifiable.
Because it is non-binding and unverifiable, it is worth nothing (it is costless to transmit and receive).
You provided no justification to express your doubt (unverifiable) and when promoted to do so you avoided (non-binding)
By definition, your posts disagreeing with literacy rate sources fall under the definition of cheap talk.
There is no need to ignore anything I write, I will address issues directly, if we keep communication civil.